# cp -r /home/ homebak/
卸载 /home
# umount /home
如果失败通过以下指令终止/home下的进程
# fuser -m -v -i -k /home
删除/home所在的lv
# lvremove -y /dev/mapper/cl_smartmsp125-home
vgdisplay命令显示LVM卷组的信息
# vgdisplay
剩余大小为441.12G。
扩展/root所在的lv,增加421.12G大小
# lvextend -L +421.12G /dev/mapper/cl_smartmsp125-root
# xfs_growfs /dev/mapper/cl_smartmsp125-root
重新创建home lv(441.12-421.12=20,还剩20G可用)
# lvcreate -L 20G -n home cl_smartmsp125
# mkfs.xfs /dev/cl_smartmsp125/home
# mount /dev/cl_smartmsp125/home /home
# cp -r homebak/ /home/
# df -h